Browsing by Issue Date, starting with "2015-04-27"

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Single-crystalline CuO nanowires for resistive random access memory applications
(2015-04-27)
Hong, Yi-Siang
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Chen, Jui-Yuan
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Huang, Chun-Wei
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Chiu, Chung-Hua
;
Huang, Yu-Ting
Recently, the mechanism of resistive random access memory (RRAM) has been partly clarified and determined to be controlled by the forming and erasing of conducting filaments (CF). However, the size of the CF may restrict the application and development as devices are scaled down. In this work, we synthesized CuO nanowires (NW) (similar to 150 nm in diameter) to fabricate a CuO NW RRAM nanodevice that was much smaller than the filament (similar to 2 mu m) observed in a bulk CuO RRAM device in a previous study. HRTEM indicated that the Cu2O phase was generated after operation, which demonstrated that the filament could be minimize to as small as 3.8 nm when the device is scaled down. In addition, energy dispersive spectroscopy (EDS) and electron energy loss spectroscopy (EELS) show the resistive switching of the dielectric layer resulted from the aggregated oxygen vacancies, which also match with the I-V fitting results. Those results not only verify the switching mechanism of CuO RRAM but also show RRAM has the potential to shrink in size, which will be beneficial to the practical application of RRAM devices. (C) 2015 AIP Publishing LLC.
Side-Chain-Bulk Effects on the Molecular Packing and Photovoltaic Performance of Benzotrithiophene-Benzooxadiazole Conjugated Copolymers
(2015-04-27)
Lan, Shang-Che
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Chang, Chiao-Kai
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Wang, Yi-Chien
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Wei, Kung-Hwa
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材料科學與工程學系
Two alternating donor-acceptor conjugated polymers, PBTTBO-C13C11 and PBTTBO-C13C8, comprising 5-alkylbenzo[1,2-b:3,4-b:5,6-d]trithiophene (BTT) as the donor and 4,7-bis(4-dodecylthien-2-yl)benzo[1,2,5]oxadiazole (BO) as the acceptor, with different alkyl side-chain architectures on their BTT units are synthesized, and their bulk heterojunction photovoltaic properties when blended with the fullerene PC71BM are characterized. Even a slight change in the length of the alkyl chain of the BTT units influences the steric bulk to such a degree that it substantially affects the molecular packing of the polymers and the performance of their photovoltaic devices. The bulkier side chains of the polymer PBTTBO-C13C11 not only prevent its crystallization, but also suppress its light-absorption coefficient relative to that of PBTTBO-C13C8, as evidenced by X-ray diffraction and UV/Vis absorption studies, presumably because of weakened intermolecular interactions. Moreover, the polymer bearing bulkier side chains, PBTTBO-C13C11, is less miscible with PC71BM than PBTTBO-C13C8, and this characteristic determines the morphology of their annealed blended films, as shown by TEM studies. The best efficiency is obtained with a device containing an annealed PBTTBO-C13C8/PC71BM (1/2 w/w) active layer that was maintained at 120 degrees C for 10 min, which shows a power conversion efficiency of 6.2%, an open-circuit voltage of 0.75 V, a short-circuit current density of 12.6 mAcm(-2), and a fill factor of 66%.
Drug carrying contact lens
(2015-04-29)
Liu, Dean-Mo
;
Liu, Pei-Ling
Hollow V2O5 Nanoassemblies for High-Performance Room-Temperature Hydrogen Sensors
(2015-04-29)
Wang, Ying-Ting
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Whang, Wha-Tzong
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Chen, Chun-Hua
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材料科學與工程學系
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Department of Materials Science and Engineering
Nanostructured oxides with Characteristic morphologies are essential building blocks for high-performance gas-sensing devices. We describe the high-yield fabrication of a series of functionalized V2O5 nanoassemblies through a facile polyol approach with specific varieties of polyvinylpyrrolidone. The synthesized V2O5 nanoassemblies consisting of tiny one-dimensional nanoblocks with the absence of any extrinsic catalysts exhibit distinct hemispherical or spherical hollow morphologies and operate as room-temperature hydrogen sensors with remarkable sensitivities and responses.
FLOW CONTROL DEVICE AND THE METHOD FOR CONTROLLING THE FLOW THEREOF
(2015-04-30)
CHIENG Wei-Hua
;
CHANG Yi
;
JENG Shyr-Long
;
WANG Chia-Chuan
;
SHIH Ching-Wei
The flow control device is provided and the method for controlling the flow. A flow control device comprises: a body including a first end, opposite second end, a first flow channel and a second flow channel, a plug and a laminar flow layer accommodated in the second flow channel; a telescopic device accommodated the length of the telescopic device is adjustable, so as to control the flow of fluid flowing through the opening area in the body.
COMMUNICATION SYSTEM BETWEEN ELECTRIC BIKES AND COMMUNICATION METHOD THEREOF
(2015-04-30)
CHANG Yi
;
CHIENG Wei-Hua
;
JENG Shyr-Long
;
CHENG Stone
;
HSU Fu-Jen
The present invention provides a communication system between electric bikes and communication method thereof. The communication system comprises a plurality of electric bikes. Each of the electric bikes comprises a monitor module and a portable electric device, wherein the portable device further comprises a storing unit and a WiFi module. The monitor module is configured to monitor the status of the electric bike to generate a plurality of monitor information. When a temporary network is formed between the electric bikes, the electric bikes transmit the monitor information each other through the temporary network and each of the electric bikes stores the received monitor information.
Lateral Diffused Metal Oxide Semiconductor
(2015-04-30)
Su Chao-Yuan
;
Wu Ching-Yi
;
Chen Hung-Bin
;
Chang Chun-Yen
A lateral diffused N-type metal oxide semiconductor device includes a semiconductor substrate, an epi-layer on the semiconductor substrate, a patterned isolation layer on the epi-layer, a N-type double diffused drain (NDDD) region in a first active region of the patterned isolation layer, a N+ heavily doped drain region disposed in the NDDD region, a P-body diffused region disposed in a second active region of the patterned isolation layer, a neighboring pair of a N+ heavily doped source region and a P+ heavily doped source region disposed in the P-body diffused region, a first gate structure disposed above a channel region of the patterned isolation layer and a second gate structure disposed above the second active region. The second gate structure and the first gate structure are spaced at a predetermined distance. A making method of the NDDD region includes using an ion implant and an epitaxy layer doping.
PORTABLE NONINVASIVE INSPECTION DEVICE
(2015-04-30)
OU-YANG MANG
;
HUANG TING-WEI
;
YANG CHIN-SIANG
;
HSIEH YAO-FANG
;
LI SING-TSUNG
The present invention discloses a portable noninvasive inspection device, which comprises a light source illuminates an target to generate an optical inspection signal; a probe head provides an optical path for said light source to receive said optical inspection signal; at least one switched filter module arranged in the optical path, allowing the optical inspection signal to pass therethrough to generate a corresponding spectral signal; and an image sensor arranged behind the switched filter module, receiving the spectral signal and generating a spectral image. The spectral image can be transmitted to an external device, wherefrom the user can use the spectral image to examine the target in further detail. The present invention features a rotary-type or movable-type switched filter module, which facilitates the user to switch filters easily during optical inspection and expands the application of the present invention.
Lateral Diffused Metal Oxide Semiconductor
(2015-04-30)
Su Chao-Yuan
;
Wu Ching-Yi
;
Chen Hung-Bin
;
Chang Chun-Yen
A lateral diffused N-type metal oxide semiconductor device includes a semiconductor substrate, an epi-layer on the semiconductor substrate, a patterned isolation layer on the epi-layer, a N-type double diffused drain (NDDD) region in a first active region of the patterned isolation layer, a N+ heavily doped drain region disposed in the NDDD region, a P-body diffused region disposed in a second active region of the patterned isolation layer, a neighboring pair of a N+ heavily doped source region and a P+ heavily doped source region disposed in the P-body diffused region, a first gate structure disposed above a channel region of the patterned isolation layer and a second gate structure disposed above the second active region. The second gate structure and the first gate structure are spaced at a predetermined distance.
Differentiation of visual spectra and nuptial colorations of two Paratanakia himantegus subspecies (Cyprinoidea: Acheilognathidae) in response to the distinct photic conditions of their habitats
(2015-05-01)
Chang, Chia-Hao
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Shao, Yi Ta
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Fu, Wen-Chung
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Anraku, Kazuhiko
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Lin, Yeong-Shin
Background: Vision, an important sensory modality of many animals, exhibits plasticity in that it adapts to environmental conditions to maintain its sensory efficiency. Nuptial coloration is used to attract mates and hence should be tightly coupled to vision. In Taiwan, two closely related bitterlings (Paratanakia himantegus himantegus and Paratanakia himantegus chii) with different male nuptial colorations reside in different habitats. We compared the visual spectral sensitivities of these subspecies with the ambient light spectra of their habitats to determine whether their visual abilities correspond with photic parameters and correlate with nuptial colorations. Results: The electroretinogram ( ERG) results revealed that the relative spectral sensitivity of P. h. himantegus was higher at 670 nm, but lower at 370 nm, than the sensitivity of P. h. chii. Both bitterlings could perceive and reflect UV light, but the UV reflection patterns differed between genders. Furthermore, the relative irradiance intensity of the light spectra in the habitat of P. h. himantegus was higher at long wavelengths (480-700 nm), but lower at short wavelengths (350-450 nm), than the light spectra in the habitats of P. h. chii. Conclusions: Two phylogenetically closely related bitterlings, P. h. himantegus and P. h. chii, dwell in different waters and exhibit different nuptial colorations and spectral sensitivities, which may be the results of speciation by sensory drive. Sensory ability and signal diversity accommodating photic environment may promote diversity of bitterling fishes. UV light was demonstrated to be a possible component of bitterling visual communication. The UV cue may assist bitterlings in gender identification.
Surface modification of alignment layer by ultraviolet irradiation to dramatically improve the detection limit of liquid-crystal- based immunoassay for the cancer biomarker CA125
(2015-05-01)
Su, Hui-Wen
;
Lee, Mon-Juan
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Lee, Wei
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影像與生醫光電研究所
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Institute of Imaging and Biomedical Photonics
Liquid crystal (LC)-based biosensing has attracted much attention in recent years. We focus on improving the detection limit of LC-based immunoassay techniques by surface modification of the surfactant alignment layer consisting of dimethyloctadecyl[3-(trimethoxysilyl) propyl] ammonium chloride (DMOAP). The cancer biomarker CA125 was detected with an array of anti-CA125 antibodies immobilized on the ultraviolet (UV)-modified DMOAP monolayer. Compared with a pristine counterpart, UV irradiation enhanced the binding affinity of the CA125 antibody and reproducibility of immunodetection in which a detection limit of 0.01 ng/ml for the cancer biomarker CA125 was achieved. Additionally, the optical texture observed under a crossed polarized microscope was correlated with the analyte concentration. In a proof-of-concept experiment using CA125spiked human serum as the analyte, specific binding between the CA125 antigen and the anti-CA125 antibody resulted in a distinct and concentration-dependent optical response despite the high background caused by nonspecific binding of other biomolecules in the human serum. Results from this study indicate that UV modification of the alignment layer, as well as detection with LCs of large birefringence, contributes to the enhanced performance of the label-free LC-based immunodetection, which may be considered a promising alternative to conventional label-based methods. (C) 2015 Society of Photo-Optical Instrumentation Engineers (SPIE)
Determination of Source-and-Drain Series Resistance in 16-nm-Gate FinFET Devices
(2015-05-01)
Su, Ping-Hsun
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Li, Yiming
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電信工程研究所
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Institute of Communications Engineering
Source/drain (S/D) series resistance is difficult to extract, owing to poor epigrowth and nonuniform distribution of current density in S/D, critical limitation of restrictive design rule, ultrathin contact film, and complicated 3-D FinFET structure. In this brief, we, for the first time, propose a novel test structure for the measurement of the S/D series resistance. This technique enables us to determine the individual value of the S/D series resistance resulting from the S/D contact, the S/D epigrowth fin, and the channel gate, respectively. Each device\'s S/D series resistance on different layout locations is characterized on the basis of its connection with specified S/D contact. The test structure and extraction method can be applied to monitor the process development of sub-16-nm-gate multifin bulk FinFET devices, such as the channel fin doping, the S/D epigrowth, and the S/D contact size formation.
Microwave Controlled Reductive Cyclization: A Selective Synthesis of Novel Benzimidazole-alkyloxypyrrolo[1,2-a]quinoxalinones
(2015-05-01)
Dhole, Sandip
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Selvaraju, Manikandan
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Maiti, Barnali
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Chanda, Kaushik
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Sun, Chung-Ming
An efficient cascade synthesis of novel benzimidazole linked alkyloxypyrrolo[1,2-a]quinoxalinones was explored on soluble polymer support under micro-Wave irradiation. Two exclusive protocols have been developed for the partial and reductive cyclization by Controlling the microwave energy, Commencing from the smile substrate, ortho nitro, pyrrol: carboxylates, N-hydroxy pyrroloquinoxalinones were obtained by,, partial reductive cyclization (60 degrees C, 7 min), and the synthesis of pyrroloquinoxalinones was accomplished by full reductive, cyclization (85 degrees C, 12 min). This method represents the first synthesis N-hydroxy pyrroloquinoxalinones using Pd/C and ammonium formate as reducing agents: Further employing a variety Of alkyl bromides, the obtained pyrroloquinoxalinones were transformed to their corresponding O-, and N-alkylated analogues to deliver the diversified, novel molecular entities.
Review of a solution-processed vertical organic transistor as a solid-state vacuum tube
(2015-05-01)
Lin, Hung-Cheng
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Zan, Hsiao-Wen
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Chao, Yu-Chiang
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Chang, Ming-Yu
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Meng, Hsin-Fei
In this paper, we investigate the key issues in raising the on/off current ratio and increasing the output current. A 1 V operated inverter composed of an enhancement-mode space-charge-limited transistor (SCLT) and a depletion-mode SCLT is demonstrated using the self-assembled monolayer modulation process. With a bulk-conduction mechanism, good bias-stress reliability, and good bending durability are obtained. Finally, key scaling-up processes, including nanoimprinting and blade-coated nanospheres, are demonstrated.
Characterizing the Stress Intensity Factor of Graphene Sheet with Central Crack
(2015-05-01)
Tsai, Jia-Lin
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Sie, Meng-Jhe
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機械工程學系
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Department of Mechanical Engineering
This paper aims to characterize the stress intensity factor (SIF) of atomistic graphene sheet with central crack subjected to uniaxial loading. The equilibrium configuration of the defective graphene sheet with missing covalent bonds was generated through molecular dynamics (MD) simulation. Subsequently, the local stress distribution near the crack tip of atomistic structure was evaluated using the Hardy stress formulation as well as the non-local elasticity theory. Based on the local stress distributions, the SIF of the atomistic graphene sheet was determined through the projection process. In comparison, the graphene sheet was also treated as a continuum solid, and the stress distribution near the crack tip as well as the SIF were evaluated from the finite element method (FEM). In an attempt to understand the crack size effect, the crack length was assumed to vary from 3 lattice distance to around 80 lattice distance. Results revealed that the SIF calculated based on the nonlocal elasticity theory in conjunction with the projection process is quite sensitive to the selection of the projection point. However, for the Hardy stress distribution, when the projection position is 1 lattice distance away from the crack tip, the SIF is quite consistent and the result is compatible to that obtained from the FEM analysis. Moreover, the agreement is better as the crack size is increasing. Therefore, the SIF calculated based on the Hardy stress formulation together with the projection approach could be a physical quantity correlating the defective atomistic graphene sheet with its continuum counterpart.
Development of a Wireless Oral-Feeding Monitoring System for Preterm Infants
(2015-05-01)
Wang, Yu-Lin
;
Hung, Jing-Sheng
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Wang, Lin-Yu
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Ko, Mei-Ju
;
Chou, Willy
Oral-feeding disorder is common in preterm infants. It not only shows the adverse effect for growth and neurodevelopment in clinical but also becomes one of the important indicators of high-risk group for neurodevelopment delay in preterm infants. Preterm infants must coordinate the motor patterns of sucking, swallowing, and respiration skillfully to avoid choking, aspiration, oxygen desaturation, bradycardia, or apnea episodes. However, up to now, the judgment and classification severity in preterm infants are mostly subjective and phasic evaluations. Directly monitoring the coordination of sucking-swallowing-breathing during oral feeding simultaneously is difficult for preterm infants. In this study, we proposed a wireless oral-feeding monitoring system for preterm infants to quantitatively monitor the sucking pressure via a designed sucking pressure sensing device, swallowing activity via a microphone to detect swallowing sound, and diaphragmatic breathing movement via surface electromyogram. Moreover, a sucking-swallowing-breathing detection algorithm is also proposed to evaluate the events of sucking-swallowing-breathing activities. Furthermore, verification of the accuracy and rationality of oral-feeding parameters with clinical findings including sucking, swallowing, and breathing in term and preterm infants had proved the practicality and value of the proposed system.
Analyzing job completion reliability and job energy consumption for a heterogeneous MapReduce cluster under different intermediate-data replication policies
(2015-05-01)
Lin, Jia-Chun
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Leu, Fang-Yie
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Chen, Ying-Ping
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資訊工程學系
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Department of Computer Science
Recently, MapReduce has been a popular distributed programming framework for solving data-intensive applications. However, a large-scale MapReduce cluster has inevitable machine/node failures and considerable energy consumption. To solve these problems, MapReduce has employed several policies for replicating input data, storing/replicating intermediate data, and re-executing failed tasks. In this study, we concentrate on two typical policies for storing/replicating intermediate data, and derive the job completion reliability (JCR for short) and job energy consumption (JEC for short) of a MapReduce cluster when the two policies are individually employed. The two policies are further analyzed and compared given various scenarios in which jobs with different input data sizes, numbers of reduce tasks, and other parameters are run in a MapReduce cluster with two extreme parallel execution capabilities. From the analytical results, MapReduce managers are able to comprehend how the two policies influence the JCR and JEC of a MapReduce cluster.
非接觸式訊號傳輸整合式裝置
(2015-05-01)
鍾世忠
;
王孝寧
本發明係有關於一種非接觸式訊號傳輸整合式裝置，運用濾波器設計之方法與概念，使訊號從晶片中傳遞轉換至印刷電路基板傳輸線上。所述裝置包括：一基板；一晶片，係設置於基板上；一第一共振單元，係設置於晶片上，並接收由晶片所產生具有一第一頻率之一第一訊號；一印刷電路基板，設置相對於基板之一間隙上；以及一第二共振單元，係設置於印刷電路基板上；其中，第一訊號經由第一共振單元使得於第一共振單元及第二共振單元之間產生一非接觸式耦合，進而使得第二共振單元產生一第二訊號，第二訊號具有實質上等於第一頻率之一第二頻率。
莊雅仲，《民主台灣：後威權時代的社會運動與文化政治》
(2015-05)
容邵武
;
Shaw-wu Jung
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College of Hakka Studies
;
International Center for Hakka Studies
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客家文化學院
本書探討三類關鍵概念：分別是公共、本土與地方問題。本書著重微觀的政治過程，以人類學特有的參與觀察，並同時提出不同的理論視角。
Influence of co-feeds additive on the photo-epoxidation of propylene over V-Ti/MCM-41 photocatalyst
(2015-05-01)
Nguyen, Van-Huy
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Lin, Shawn D.
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Wu, Jeffrey C. S.
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Bai, Hsunling
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環境工程研究所
In this work, the effects of co-feed species, namely, H2O or H-2, on the photocatalytic epoxidation of propylene over V-Ti/MCM-41 are examined. A promoting effect on the C3H6 consumption rate is found under 0.6 kPa H2O co-feed when the PO (propylene oxide) formation rate is not proportionally promoted, resulting a slightly decreased PO selectivity. With increasing H2O concentration, the reaction activity decreases and this can be attributed to surface site blocking by excess H2O. The presence of H2O also increases the stability of photocatalyst during reaction. Similar observation of the enhanced C3H6 consumption rate and the improved stability is found when 5.6 kPa H-2 is used as co-feed. We found that the catalyst stability is improved when the AA (acetaldehyde) is increased. This suggests that AA accumulation on the catalyst surface may lead to surface fouling and the observed deactivation. The presence of H2O or H-2 co-feed, which can lead to hydroxyl radical (OH.), may impose a shift in the production formation of photocatalytic reaction. (C) 2014 Elsevier B.V. All rights reserved.